KR102206734B1 - Method and apparatus for measuring voltage of battery pack - Google Patents

Abstract

A method and apparatus for measuring the voltage of a battery pack are disclosed. A battery control device according to an embodiment includes a voltage divider for distributing a voltage of a battery pack using at least two distributing elements connected to a battery pack including a plurality of battery modules, and a battery pack by measuring the voltage of the distributed battery pack. It may include a voltage extraction unit for extracting the voltage value of.

Description

Method and apparatus for measuring voltage of battery pack {METHOD AND APPARATUS FOR MEASURING VOLTAGE OF BATTERY PACK}

The following embodiments relate to a method and apparatus for measuring a voltage of a battery pack.

With environmental issues and energy resource issues becoming more important, electric vehicles are in the spotlight as a means of transportation of the future. The electric vehicle has an advantage that there is no exhaust gas and very little noise because a plurality of rechargeable secondary cells are used as a main power source as a single pack.

In an electric vehicle, since the battery functions like an engine and a fuel tank of a gasoline vehicle, it may be important to check the state of the battery for safety of an electric vehicle user.

In recent years, research has been continued to more accurately check the state of the battery and detect a battery error.

A battery control apparatus according to an embodiment includes a battery module voltage measuring unit corresponding to any one of a plurality of battery modules constituting a battery pack and measuring a voltage of the corresponding battery module; And a battery pack voltage measuring unit measuring the voltage of the battery pack.

The battery pack voltage measurement unit may include a voltage divider that distributes the voltage of the battery pack using at least two distribution elements connected to the battery pack; And a voltage extractor configured to extract a voltage value of the battery pack by measuring the voltage of the distributed battery pack.

A first distribution element included in the at least two distribution elements is connected to a ground portion of the battery pack, and a second distribution element included in the at least two distribution elements is a voltage based on the ground portion of the plurality of battery modules. It can be connected to the highest battery module.

The at least two distribution elements may be resistors.

The voltage extractor may include an analog-to-digital converter, and may extract a voltage value of the battery pack by converting the distributed voltage of the battery pack into a digital signal using the analog-to-digital converter.

The battery module voltage measurement unit may measure a voltage of a first battery module among the plurality of battery modules, and the battery pack voltage measurement unit may measure a voltage of a second battery module among the plurality of battery modules.

The battery control device may control the battery module voltage measurement unit and the battery pack voltage measurement unit.

The battery pack voltage measurement unit may transmit a voltage value of the battery pack to the control unit.

The battery control device may further include a first insulating part electrically separating the battery pack voltage measuring part from the control part.

The battery pack voltage measurement unit may transmit a voltage value of the battery pack to the control unit when the battery pack voltage measurement unit and the control unit are electrically separated by the first insulating unit.

The battery control device may further include a second insulating part electrically separating the battery module voltage measuring part from the control part.

The battery pack voltage measurement unit may transmit a voltage value of the battery pack to the battery module voltage measurement unit.

When the battery module voltage measurement unit and the control unit are electrically separated by the second insulation unit, the battery module voltage measurement unit transmits a voltage value of the battery pack received from the battery pack voltage measurement unit to the control unit. I can.

The voltage divider may include a switching unit that turns on/off a connection between the at least two distribution elements and a ground part of the battery pack.

When receiving the voltage value of the battery pack from the battery pack voltage measurement unit, the control unit may control the switching unit to turn off the connection between the at least two distribution elements and the ground unit of the battery pack. have.

A method of controlling an apparatus for measuring a voltage of a battery pack according to an embodiment includes the steps of: distributing a voltage of the battery pack using at least two distribution elements connected to a battery pack including a plurality of battery modules; And extracting a voltage value of the battery pack by measuring the voltage of the distributed battery pack.

The method of controlling the battery pack voltage measuring apparatus according to an embodiment may further include measuring a voltage of any one of the plurality of battery modules.

In the step of extracting the voltage value of the battery pack, the voltage value of the battery pack may be extracted by converting the distributed voltage of the battery pack into a digital signal.

The control method of the battery pack voltage measuring apparatus according to an embodiment may further include turning on/off a connection between the at least two distribution elements and a ground portion of the battery pack.

The step of turning on/off the connection may include receiving a control signal from a control device that controls the battery pack voltage measuring device; And turning on/off a connection between the at least two distribution elements and a ground portion of the battery pack according to the control signal.

A method of controlling a battery pack voltage measuring device according to an embodiment includes the steps of electrically separating the battery pack voltage measuring device and a control device controlling the battery pack voltage measuring device; And when the battery pack voltage measuring device and the control device are electrically separated, transmitting a voltage value of the battery pack to the control device.

The control method of the battery pack voltage measuring apparatus according to an embodiment further includes the step of turning off the connection between the at least two distribution elements and the ground part of the battery pack when the voltage value of the battery pack is extracted. Can include.

1 is a block diagram showing a battery system according to an embodiment.
2 is a diagram illustrating a battery pack voltage measuring unit according to an exemplary embodiment.
3 is a diagram for describing a battery control device according to an exemplary embodiment.
4 is a diagram for describing a battery control device according to another exemplary embodiment.
5 is a flowchart illustrating a method of controlling a battery pack voltage measuring apparatus according to an exemplary embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. The same reference numerals in each drawing indicate the same members.

Various changes may be made to the embodiments described below. The embodiments described below are not intended to be limited to the embodiments, and should be understood to include all changes, equivalents, and substitutes thereto.

The terms used in the examples are used only to describe specific embodiments, and are not intended to limit the embodiments. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, in the description with reference to the accompanying drawings, the same reference numerals are assigned to the same components regardless of the reference numerals, and redundant descriptions thereof will be omitted. In describing the embodiments, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the embodiments, the detailed description thereof will be omitted.

1 is a block diagram showing a battery system according to an embodiment.

Referring to FIG. 1, a battery system 110 according to an exemplary embodiment may include a battery pack 120 and a battery control device 130. The battery pack 120 may supply power to a driving means (eg, an electric vehicle or an electric bicycle) on which the battery system 110 is mounted, and may include a plurality of battery modules. In one embodiment, the plurality of battery modules may be secondary batteries such as lithium ion batteries. Capacities or voltages of the plurality of battery modules may be the same or different from each other. The battery system 110 may refer to an energy storage system (ESS).

The battery control device 130 may monitor the state of the battery pack 120 and control the battery pack 120. The battery control device 130 may represent a battery management system (BMS).

In one embodiment, the battery control device 130 may perform thermal control of a plurality of battery modules included in the battery pack 120. In addition, the battery control device 130 may prevent overcharging and overdischarging of the plurality of battery modules, and control the state of charge between the plurality of battery modules to be equal. Accordingly, energy efficiency of the plurality of battery modules may be increased, and the life of the plurality of battery modules may be extended.

In addition, the battery control device 130 may estimate life information (State of Health: SoH), charge information (State of Charge: SoC), and function information (State of Function: SoF) of a plurality of battery modules. Here, the life information indicates the degree of deterioration of the performance of the battery pack 120 compared to the manufacturing of the battery pack 120, the charge information indicates information on the amount of charge accommodated in the battery pack 120, and the function information indicates a battery Information on how much the performance of the pack 120 meets a predetermined condition may be displayed.

The battery control device 130 may provide life information, charging information, and function information to an electronic control unit (ECU). In an embodiment, the battery control device 130 may communicate with an electronic control device (ECU) using controller area network (CAN) communication.

The battery control device 130 may include a first battery module voltage measurement unit 140 and a battery pack voltage measurement unit 150.

The first battery module voltage measuring unit 140 corresponds to the first battery module 121 and may measure the voltage of the first battery module 121. In an embodiment, when the number of battery modules is n, the battery control device 130 may include a first battery module voltage measurement unit 140 to an n-1th battery module voltage measurement unit (not shown), , The first battery module voltage measurement unit 140 to the n-1th battery module voltage measurement unit (not shown) measure voltages of the first battery module 121 to the n-1th battery module (not shown), respectively. I can.

The battery pack voltage measurement unit 150 may include a module voltage measurement unit 151, a voltage distribution unit 152, and a voltage extraction unit 153.

The module voltage measurement unit 151 may measure the voltage of the n-th battery module 122. The voltage divider 152 may include at least two distribution elements. Here, the distribution element may be a resistor. The voltage divider 152 may be connected to the first battery module 121 having the highest voltage from the ground part in the battery pack 120, and may be connected to the n-th battery module 122 connected to the ground part. In one embodiment, the first distribution element included in the voltage distribution unit 152 is connected to a battery cell having the highest voltage from a ground unit among a plurality of battery cells constituting the first battery module 121, and the voltage distribution unit The second distribution element included in 152 may be connected to the ground. In addition, as the plurality of battery modules of the battery pack 120 are connected in series, the voltage of the first battery module 121 may be the highest among the plurality of battery modules, and the plurality of battery modules constituting the first battery module 121 The voltage of the battery cell having the highest voltage from the ground part among the battery cells may represent the total voltage of the battery pack 120. Accordingly, the entire voltage of the battery pack 120 may be applied to the voltage divider 152.

The voltage divider 152 may distribute the voltage of the battery pack 120 in proportion to the capacities of the at least two distribution elements. The voltage extractor 153 may extract a voltage value of the battery pack 120 by measuring the voltage of the distributed battery pack 120. In an embodiment, the voltage extractor 153 may extract a voltage value of the nth battery module 122 from the voltage of the nth battery module 122 measured by the module voltage measurement unit 151.

The battery pack voltage measurement unit 150 uses the extracted voltage value of the battery pack 120 into another unit in the battery control device 130 (for example, a microcontroller unit (MCU) or an electronic device that controls the battery control device 130). It can be transmitted to the control unit (ECU).

2 is a diagram illustrating a battery pack voltage measuring unit according to an exemplary embodiment.

Referring to FIG. 2, the battery pack 210 may include a plurality of battery modules. Each of the plurality of battery modules may include a plurality of battery cells. A plurality of battery modules may be connected to each other in series, and a plurality of battery cells may be connected to each other in series. The battery cell 214 of the battery module 212 may be connected to the ground 250.

The battery pack voltage measurement unit 220 may include a voltage divider 230 and a voltage extractor 240. The voltage divider 230 may include resistors 231 and 232 and a switch 233. The voltage extractor 240 may include an analog input port 241, a digital output port 242, and a ground (GND) port 243. The voltage extraction unit 240 may include an analog-to-digital converter, and may receive an analog signal from the analog input port 241 and convert the analog signal into a digital signal. The voltage extractor 240 may transmit the converted digital signal to a controller (not shown).

The resistors 231 and 232 may be connected to each other in series. The branch point 234 between the resistors 231 and 232 and the analog input port 241 of the voltage extractor 240 may be connected. The switch 233 and the digital output port 242 of the voltage extractor 240 may be connected. The switch 233 may turn on/off a connection between the resistor 232 and the ground 250, and the ground port 243 may be connected to the ground 250. Accordingly, the battery pack 210, the voltage divider 230, and the voltage extractor 240 may be connected to one ground 250.

In the voltage divider 230, the resistor 231 may be connected to the battery cell 213 of the battery module 210, and the resistor 232 may be connected to the ground 250 via the switch 233.

The voltage extractor 240 may transmit a control signal for connecting the resistor 232 and the ground 250 to the switch 233 through the digital output port 242. In one embodiment, the voltage extraction unit 240 receives a signal for turning on the switch 233 from a control device (not shown) that controls the voltage extraction unit 240, and in response to receiving the signal A control signal for connecting the resistor 232 and the ground 250 may be transmitted to the switch 233.

When the switch 233 is turned on and the resistor 232 and the ground 250 are connected, the voltage of the battery cell 213 may be applied to the resistors 231 and 232. A plurality of battery modules of the battery pack 210 may be connected to each other in series, and a plurality of battery cells included in the plurality of battery modules may be connected to each other in series. Accordingly, among the plurality of battery cells included in the plurality of battery modules, the voltage of the battery cell 213 of the battery module 211 may be the highest with respect to the ground 250, and the voltage of the battery cell 213 is the battery It may represent the voltage of the pack 210. Accordingly, the voltage of the battery pack 210 may be applied to the resistors 231 and 232.

The resistors 231 and 232 may distribute the voltage of the battery pack 210 according to capacity. A voltage applied to the resistor 232 may be input to the analog input port 241. The voltage input to the analog input port 241 can be expressed as in Equation 1.

[Equation 1]

Here, V _o represents the voltage input to the analog input port 241, R ₁ represents the capacity of the resistor 231, R ₂ represents the capacity of the resistor 232, V _p represents the battery pack 210 Can represent the voltage of For example, when the capacity of the resistor 231 is 999 Ω (ohm), the capacity of the resistor 232 is 1 Ω, and the voltage of the battery pack 210 is 1000 V (Volt), the resistance 231 has 999 V may be applied, and 1 V may be applied to the resistor 232. Accordingly, the analog input port 241 may receive a voltage of 1 V through the branch point 234. In one embodiment, the capacity of the resistors 231 and 232 may be adjusted according to a voltage range that can be input to the analog input port 241. For example, when the voltage range that can be input to the analog input port 241 is 0 to 5 V, the capacity of the resistors 231 and 232 may be adjusted so that a voltage between 0 and 5 V is applied to the resistor 232. I can.

The voltage extractor 240 may extract a voltage value of the battery pack 210 by converting a voltage input from the analog input port 241 into a digital signal using an analog digital converter. In an embodiment, the voltage extractor 240 may store information on the capacity ratio of the resistors 231 and 232 in advance, or may detect the capacity ratio of the resistors 231 and 232. The voltage extractor 240 may extract a voltage value of the battery pack 210 by using the capacity ratio of the resistors 231 and 232 and a voltage value converted into a digital signal.

The voltage extraction unit 240 may transmit the voltage value of the battery pack 210 to a control device (not shown) that controls the battery pack voltage measurement unit 220. Further, the voltage extractor 240 may extract the voltage value of the battery pack 210 and then control the switch 233 to turn off the connection between the resistor 232 and the ground 250. Accordingly, after the voltage value of the battery pack 210 is extracted, the voltage of the battery pack 210 is not applied to the resistors 231 and 232, so that the leakage current flowing through the resistors 231 and 232 is blocked. Can be.

3 is a diagram for describing a battery control device according to an exemplary embodiment.

Referring to FIG. 3, the battery pack 310 may include a plurality of battery modules. Each of the plurality of battery modules may include a plurality of battery cells. A plurality of battery modules may be connected to each other in series, and a plurality of battery cells may be connected to each other in series. The battery cell 314 may be connected to the ground 380.

The battery control device 320 may include a voltage distribution unit 330, a voltage measurement unit 340, a battery module voltage measurement unit 350, an insulation unit 360, and a control unit 370. The control unit 370 may include a micro control unit (MCU).

The battery module voltage measurement unit 350 may measure the voltage of the battery module 312.

The voltage measurement unit 340 may include a voltage extraction unit 341 and a module voltage measurement unit 345. The module voltage measurement unit 345 may measure the voltage of the battery module 311. For example, a plurality of voltage ports of the module voltage measuring unit 345 and a plurality of battery cells included in the battery module 311 may be connected. The module voltage measurement unit 345 may receive voltages of each of the plurality of battery cells included in the battery module 311 through a plurality of voltage ports, and the module voltage measurement unit 345 may receive each of the received plurality of battery cells. The voltage of the battery module 311 may be measured using the voltage of.

The voltage extraction unit 341 may include an analog input port 342, a digital output port 343 and a ground port 344.

The voltage divider 330 may include resistors 331 and 332 and a switch 333.

The resistors 331 and 332 may be connected to each other in series. The branch point 334 between the resistors 331 and 332 and the analog input port 342 may be connected. The switch 333 and the digital output port 343 may be connected. The switch 333 may turn on/off a connection between the resistor 332 and the ground 380.

The resistor 331 may be connected to the battery cell 313, and the resistor 332 may be connected to the ground 380 via the switch 333.

The voltage measurement unit 340 may transmit a control signal for connecting the resistor 332 and the ground 380 to the switch 333 through the digital output port 343. In an embodiment, the voltage measurement unit 340 may turn on/off the switch 333 under the control of the controller 370. For example, the controller 370 may set the operation mode of the battery control device 320 to a voltage extraction mode in which a voltage value of the battery pack 310 is extracted. In the voltage extraction mode, the control unit 370 may transmit a signal for turning on the switch 333 to the voltage measurement unit 340. The voltage measurement unit 340 switches a control signal for connecting the resistor 332 and the ground 380 to the switch 333 through the digital output port 343 in response to receiving a signal from the control unit 370. Can be sent to (333). In addition, the controller 370 may set the operation mode of the battery control device 320 to a general mode. In the normal mode, the control unit 370 may transmit a signal for turning off the switch 333 to the voltage measurement unit 340, and the voltage measurement unit 340 is configured to receive a signal from the control unit 370. In response, a control signal for turning off the connection of the resistor 332 and the ground 380 to the switch 333 through the digital output port 343 may be transmitted to the switch 333.

When the switch 333 is turned on and the resistor 332 and the ground 380 are connected, the voltage of the battery cell 313 may be applied to the resistors 331 and 332. The plurality of battery modules may be connected in series, and the voltage of the battery cell 313 may be the highest among the plurality of battery cells included in the battery module 311. Accordingly, among the plurality of battery cells included in the plurality of battery modules, the voltage of the battery cell 313 may be the highest with respect to the ground 380, and the voltage of the battery cell 313 is the voltage of the battery pack 310 Can represent. Accordingly, the voltage of the battery pack 310 may be applied to the resistors 331 and 332. The resistors 331 and 332 may distribute the voltage of the battery pack 310 according to capacity. A voltage applied to the resistor 332 may be input to the analog input port 342.

The voltage extracting unit 341 may include an analog-to-digital converter, and may extract a voltage value of the battery pack 310 by converting a voltage input from the analog input port 342 into a digital signal.

The voltage measurement unit 340 may transmit the voltage value of the battery pack 310 to the control unit 370. In an embodiment, the voltage measurement unit 340 may be connected to the battery pack 310 to have a high voltage, and the control unit 370 may be a low voltage. In this case, when the voltage measurement unit 340 transmits the voltage value of the battery pack 310 to the control unit 370, an error may occur due to the transmission of the voltage value. For example, data including information on the voltage value of the battery pack 310 in the voltage measurement unit 340 in a state in which the voltage measurement unit 340 and the control unit 370 are not electrically separated In the case of transmission, the potential of the ground 380 may be shaken. As the potential of the ground 380 is shaken, an error occurs in the data transmitted by the voltage measurement unit 340, so that the controller 370 may not be able to obtain a voltage value. To this end, the insulation unit 360 may be connected between the voltage measurement unit 340 and the control unit 370, and may electrically separate the voltage measurement unit 340 and the control unit 370 from each other. When the voltage measurement unit 340 and the control unit 370 are electrically separated by the insulation unit 360, the voltage measurement unit 340 may transmit a voltage value of the battery pack 310 to the control unit 370. When the controller 370 receives the voltage value of the battery pack 310, the controller 370 may control the switch 333 to turn off the connection between the resistor 332 and the ground 380. . In an embodiment, the controller 370 may estimate life information, charging information, or function information of the battery pack 310 by using the voltage value of the battery pack 310.

Also, in an embodiment, the control unit 370 may detect an error in the battery pack 310. For example, the battery control device 320 may include a plurality of battery module voltage measurement units, and each of the plurality of battery module voltage measurement units measures a voltage of a corresponding battery module and controls the voltage value of the battery module ( 370). For example, the battery module voltage measurement unit 350 may extract the voltage value of the battery module 312 and transmit it to the control unit 370. In addition, the module voltage measurement unit 345 may extract the voltage value of the battery module 311 and transmit it to the controller 370. The controller 370 may detect an error of the battery pack 310 by comparing the voltage value of each of the plurality of battery modules with the voltage value of the battery pack 310. When an error of the battery pack 310 is detected, the control unit 370 transmits information indicating that the error has been detected in the battery pack 310 to the electronic control unit (ECU), or power to the driving means of the battery pack 310 Supply can be cut off.

4 is a diagram for describing a battery control device according to another exemplary embodiment.

Referring to FIG. 4, the battery pack 410 may include a plurality of battery modules. Each of the plurality of battery modules may include a plurality of battery cells. A plurality of battery modules may be connected to each other in series, and a plurality of battery cells may be connected to each other in series. The battery cell 414 may be connected to the ground 480.

The battery control device 420 may include a battery module voltage measurement unit 430, a voltage distribution unit 440, a voltage measurement unit 450, an insulation unit 460, and a control unit 470.

The battery module voltage measuring unit 430 may measure the voltage of the battery module 411.

The voltage measurement unit 450 may include a voltage extraction unit 451 and a module voltage measurement unit 455. The module voltage measurement unit 455 may measure the voltage of the battery module 412.

The voltage extraction unit 451 may include an analog input port 452, a digital output port 453, and a ground port 454.

The voltage divider 430 may include resistors 441 and 442 and a switch 443.

The resistors 441 and 442 may be connected to each other in series. The branch point 444 between the resistors 441 and 442 and the analog input port 452 may be connected. The switch 443 and the digital output port 453 may be connected. The switch 443 may turn on/off a connection between the resistor 442 and the ground 480. The ground port 454 may be connected to the ground 480.

The resistor 441 may be connected to the battery cell 413, and the resistor 332 may be connected to the ground 480 via the switch 443.

The voltage measurement unit 450 may transmit a control signal for connecting the resistor 442 and the ground 480 to the switch 443 through the digital output port 453. In an embodiment, the voltage measurement unit 450 may turn on/off the switch 443 under the control of the controller 470. When the switch 443 is turned on and the resistor 442 and the ground 480 are connected, the voltage of the battery cell 413 may be applied to the resistors 441 and 442. The plurality of battery modules may be connected in series, and the voltage of the battery cell 413 may be the highest among the plurality of battery cells included in the battery module 411. Accordingly, among the plurality of battery cells included in the plurality of battery modules, the voltage of the battery cell 413 may be the highest with respect to the ground 480, and the voltage of the battery cell 413 is the voltage of the battery pack 410 Can represent. Accordingly, the voltage of the battery pack 410 may be applied to the resistors 441 and 442. The resistors 441 and 442 may distribute the voltage of the battery pack 410 according to capacity. A voltage applied to the resistor 442 may be input to the analog input port 452.

The voltage extracting unit 451 may include an analog-to-digital converter, and may extract a voltage value of the battery pack 410 by converting a voltage input from the analog input port 452 into a digital signal.

In an embodiment, the insulation unit 460 is connected between the battery module voltage measurement unit 430 and the control unit 470, and may electrically separate the battery module voltage measurement unit 430 and the control unit 470. In this case, the voltage measurement unit 450 may transmit the voltage value of the battery pack 410 to the battery module voltage measurement unit 430. When the battery module voltage measurement unit 430 and the control unit 470 are electrically separated by the insulation unit 460, the battery module voltage measurement unit 430 is the battery pack 410 received from the voltage measurement unit 450. The voltage value of may be transmitted to the controller 470.

When the controller 470 receives the voltage value of the battery pack 410, the controller 470 may control the switch 443 to turn off the connection between the resistor 442 and the ground 480. .

5 is a flowchart illustrating a method of controlling a battery pack voltage measuring apparatus according to an exemplary embodiment.

Referring to FIG. 5, the battery pack voltage measuring apparatus may turn on a connection between at least two distribution elements connected to a battery pack including a plurality of battery modules and a ground part of the battery pack (510 ). The battery pack voltage measurement device may include a switching unit that turns on/off a connection between at least two distribution elements and a ground unit of the battery pack, and controls the switching unit to control at least two distribution elements and a ground unit. I can connect. In an embodiment, the battery pack voltage measurement device may receive a control signal from a control device that controls the battery pack voltage measurement device, and connect at least two distribution elements and a ground part of the battery pack by controlling the switching unit according to the control signal. I can. For example, the control device may set the operation mode to a voltage extraction mode for extracting a voltage value of the battery pack. In the voltage extraction mode, the control device may transmit a signal for turning on the switching unit to the battery pack voltage measuring device. The battery pack voltage measuring apparatus may turn on a connection between at least two distribution elements and a ground portion of the battery pack by controlling the switching unit according to a signal received from the control device.

Also, in an embodiment, the battery pack voltage measuring apparatus may measure a voltage of any one of a plurality of battery modules.

In addition, the battery pack voltage measuring apparatus may distribute the voltage of the battery pack using at least two distribution elements (520). Of the at least two distribution elements, a first distribution element may be connected to a battery module having the highest voltage among a plurality of battery modules included in the battery pack, and the second distribution element may be connected to a ground portion of the battery pack. Accordingly, the voltage of the battery pack may be applied to at least two distribution elements, and the voltage of the battery pack may be distributed according to the capacity of the at least two distribution elements.

In addition, the battery pack voltage measuring apparatus may measure the voltage of the distributed battery pack and extract a voltage value of the battery pack (530 ). The battery pack voltage measuring apparatus may extract a voltage value of the battery pack by converting the distributed voltage of the battery pack into a digital signal. In addition, the battery pack voltage measuring device may transmit a voltage value of the battery pack to the control device. In this case, the battery pack voltage measuring device can electrically separate the battery pack voltage measuring device and the control device, and when the battery pack voltage measuring device and the control device are electrically separated, the voltage value of the battery pack is transmitted to the control device. I can.

In addition, the battery pack voltage measuring apparatus may turn off the connection between at least two distribution elements and a ground portion of the battery pack (540 ). In one embodiment, the battery pack voltage measuring device may receive a control signal from the control device, and control the switching unit according to the control signal to turn off the connection between at least two distribution elements and the ground portion of the battery pack. I can. For example, when the control device receives a voltage value of the battery pack from the battery pack voltage measuring device, the control device may set the operation mode to a normal mode. In the normal mode, the control device can transmit a signal for turning off the switching unit to the battery pack voltage measurement device, and the battery pack voltage measurement device controls the switching unit in response to receiving a signal from the control device The connection between the distribution elements and the ground part of the battery pack may be turned off.

Since the contents described with reference to FIGS. 1 to 4 may be applied to the control method of the battery pack voltage measuring apparatus according to the exemplary embodiment illustrated in FIG. 5, a more detailed description will be omitted.

The apparatus described above may be implemented as a hardware component, a software component, and/or a combination of a hardware component and a software component. For example, the devices and components described in the embodiments include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA), It can be implemented using one or more general purpose computers or special purpose computers, such as a programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications executed on the operating system. In addition, the processing device may access, store, manipulate, process, and generate data in response to the execution of software. For the convenience of understanding, although it is sometimes described that one processing device is used, one of ordinary skill in the art, the processing device is a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that it may include. For example, the processing device may include a plurality of processors or one processor and one controller. In addition, other processing configurations are possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of these, configuring the processing unit to behave as desired or processed independently or collectively. You can command the device. Software and/or data may be interpreted by a processing device or to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodyed in a transmitted signal wave. The software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware device specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of the program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operation of the embodiment, and vice versa.

As described above, although the embodiments have been described by the limited embodiments and drawings, various modifications and variations are possible from the above description by those of ordinary skill in the art. For example, the described techniques are performed in a different order from the described method, and/or components such as a system, structure, device, circuit, etc. described are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and claims and equivalents fall within the scope of the claims to be described later.

Claims (19)

In the battery control device,
A battery module voltage measurement unit that corresponds to any one of a plurality of battery modules constituting the battery pack and measures a voltage of the corresponding battery module; And
Battery pack voltage measurement unit measuring the voltage of the battery pack
Including,
The battery pack voltage measuring unit,
A voltage divider for distributing the voltage of the battery pack using at least two distribution elements connected to the battery pack;
A voltage extractor configured to measure a voltage of the distributed battery pack and extract a voltage value of the battery pack; And
A control unit for controlling the battery module voltage measurement unit and the battery pack voltage measurement unit
Including,
When the battery module voltage measurement unit and the control unit are electrically separated, the battery pack voltage measurement unit transmits the voltage value of the battery pack to the control unit through the battery module voltage measurement unit,
The control unit controls the voltage divider based on the voltage value of the battery pack.
The method of claim 1,
A first distribution element included in the at least two distribution elements is connected to a ground portion of the battery pack,
The second distribution element included in the at least two distribution elements is connected to a battery module having the highest voltage with respect to the ground part among the plurality of battery modules,
Battery control device.
The method of claim 1,
The at least two distribution elements are resistors,
Battery control device.
The method of claim 1,
The voltage extraction unit,
Including an analog to digital conversion unit,
Converting the voltage of the distributed battery pack into a digital signal using the analog-to-digital converter to extract the voltage value of the battery pack,
Battery control device.
The method of claim 1,
The battery module voltage measuring unit,
Measuring the voltage of the first battery module among the plurality of battery modules,
The battery pack voltage measuring unit,
A module voltage extraction unit that measures a voltage of a second battery module among the plurality of battery modules
Battery control device comprising a.
The method of claim 1,
The battery control device,
A control unit for controlling the battery module voltage measurement unit and the battery pack voltage measurement unit
Battery control device further comprising a.
The method of claim 6,
The battery pack voltage measuring unit,
Transmitting the voltage value of the battery pack to the controller,
Battery control device.
The method of claim 6,
The battery control device,
A first insulating part electrically separating the battery pack voltage measuring part and the control part
Including more,
The battery pack voltage measuring unit,
When the battery pack voltage measurement unit and the control unit are electrically separated by the first insulation unit, transmitting a voltage value of the battery pack to the control unit,
Battery control device.
The method of claim 6,
The battery control device,
A second insulating part electrically separating the battery module voltage measuring part and the control part
Including more,
The battery pack voltage measuring unit,
When the battery module voltage measurement unit and the control unit are electrically separated by the second insulation unit, transmitting a voltage value of the battery pack to the battery module voltage measurement unit,
Battery control device.
The method of claim 9,
The battery module voltage measuring unit,
When the battery module voltage measurement unit and the control unit are electrically separated by the second insulation unit, transmitting a voltage value of the battery pack received from the battery pack voltage measurement unit to the control unit,
Battery control device.
The method of claim 6,
The voltage divider,
A switching unit that turns on/off a connection between the at least two distribution elements and a ground portion of the battery pack
Battery control device comprising a.
The method of claim 11,
The control unit,
When receiving the voltage value of the battery pack from the battery pack voltage measuring unit,
Controlling the switching unit to turn off the connection between the at least two distribution elements and the ground unit of the battery pack,
Battery control device.
In the control method of the battery pack voltage measuring device,
Measuring a voltage of any one of the plurality of battery modules;
Distributing the voltage of the battery pack using at least two distribution elements connected to the battery pack including the plurality of battery modules;
Extracting a voltage value of the battery pack by measuring the voltage of the distributed battery pack; And
Controlling a battery module voltage measuring unit measuring any one voltage among the plurality of battery modules and a battery pack voltage measuring unit measuring the battery pack voltage using a control unit
Including,
When the battery module voltage measurement unit and the control unit are electrically separated, the battery pack voltage measurement unit transmits the voltage value of the battery pack to the control unit through the battery module voltage measurement unit,
The controlling comprises controlling a voltage divider that distributes the voltage of the battery pack based on the voltage value of the battery pack.
Control method of the battery pack voltage measuring device.
delete The method of claim 13,
Extracting the voltage value of the battery pack,
Converting the distributed voltage of the battery pack into a digital signal to extract the voltage value of the battery pack,
Control method of the battery pack voltage measuring device.
The method of claim 13,
Turning on/off a connection between the at least two distribution elements and a ground portion of the battery pack
Control method of a battery pack voltage measuring device further comprising a.
The method of claim 16,
The step of turning on/off the connection,
Receiving a control signal from a control device that controls the battery pack voltage measuring device; And
Turning on/off the connection between the at least two distribution elements and the ground part of the battery pack according to the control signal
Control method of a battery pack voltage measuring device comprising a.
The method of claim 13,
Electrically separating the battery pack voltage measuring device from the control device for controlling the battery pack voltage measuring device; And
When the battery pack voltage measuring device and the control device are electrically separated, transmitting a voltage value of the battery pack to the control device
Control method of a battery pack voltage measuring device further comprising a.
The method of claim 16,
When the voltage value of the battery pack is extracted, turning off the connection between the at least two distribution elements and the ground part of the battery pack
Control method of a battery pack voltage measuring device further comprising a.

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